Mercenary Enrollment is written by YC and illustrated by Rak Hyun. It is produced and published by STUDIO JHS. It started to be published on November 6, 2020 on Naver SERIES, platform for publishing books and comics. The next day, it started being published on Naver WEBTOON, Korean comic book publishing platform. Mercenary Enrollment : Yu Ijin was the sole survivor of a plane crash when he was little. After becoming a mercenary to survive for 10 years, he returns to his family in his hometown.